THE INFRARED-SPECTRA OF THE DIATOMIC HYDRIDES ALH AND GAH AND INTENSITY ANALYSES FROM FTIR MEASUREMENTS

High-resolution infrared spectra of aluminum hydride and gallium hydri de produced in a heat pipe cell by the reaction of corresponding metal s with hydrogen at high temperature were successfully observed with an FTIR spectrometer. The 88 and 111 transitions for AIH and GaH were me asured and the molecular constants were refined by fitting the newly o bserved and already reported transitions simultaneously. Intensity ana lyses were carried out to estimate the Herman-Wallis effect. The sensi tivity of the FTIR method is discussed by comparing it with that of in frared diode laser method. (C) 1994 Academic Press, Inc.